pegjs/docs/guides/plugins.md

Plugins

You can use plugins by simply passing them to the generate method (e.g. peg.generate(grammar, { plugins: [plugin1, plugin2, etc] })).

Creating a Plugin

Plugins are expected to be an object that contains at least one method: use( session, options )

• session - See the docs for peg.compiler.Session
• options - see the docs for peg.generate and peg.compiler.compile

Here is a simple example:

import customGrammarParser from "./parser";

export function use( session, options ) {

    // Replace the grammar parser
    session.parser = customGrammarParser;

    // always output the source
    options.output = "source";

}

Resources

You can find some plugins to use on

• the PEG.js wiki (or add yours to the list for other's to find)
• NPM: https://www.npmjs.com/browse/keyword/pegjs